rotatedlog

Stream a collection of rotated logs

npm install rotatedlog
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rotated_log streams a collection of rotated logs

Synopsis

Given a log file access.log in the following format

1376611200000 <some data>
1376611201000 <some data>
1376611202000 <some data>

and rotated in the format $log-$date.{xz,gz,bz2} so that the directory looks like

access.log
access.log-20130801.xz
access.log-20130701.xz
access.log-20130601.xz

This library will provide a way to stream (and follow) the entire log when given a timestamp to start from.

Installation

$ npm install rotatedlog

Usage

var log = require('rotatedlog');

var path = '/path/to/access.log'
  , start_point = 1376611201000;

log.stream(path, start_point, function (err, stream) {

    stream.on('data', function (chunk) {
        // ...
    });

});

Additional notes

  • No buffering takes place. You'll need to parse lines yourself if you want line-by-line streaming
  • The start_point is only used to find the first file to stream, i.e. the final stream may contain some data that was logged before the starting timestamp
  • The stream stays open to accept new data (equivalent to a tail -F $log)

License (MIT)

Copyright (c) 2013 Sydney Stockholm opensource@sydneystockholm.com

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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